Abstract
Purpose: In clinical MRI cardiac motion is commonly dealt with using ECG based synchronization. ECG is prone to interference with electromagnetic fields and to magneto-hydrodynamic effects, in particular at (ultra)high magnetic field strengths (1). For all these reasons, a non- invasive, fully MR compatible cardiac monitoring and gating approach which presents suitability for all magnetic field strengths is conceptually appealing. For this purpose a cardiac monitoring and gating device that employs acoustic signals was developed. The applicability and robustness of the proposed triggering device is explored in cardiac gated, 3D phase contrast MR angiography (3D PCMRA) studies at 1.5 T, 3.0 T and 7.0 T.
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